2 * common header for vfio based device assignment support
4 * Copyright Red Hat, Inc. 2012
7 * Alex Williamson <alex.williamson@redhat.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
12 * Based on qemu-kvm device-assignment:
13 * Adapted for KVM by Qumranet.
14 * Copyright (c) 2007, Neocleus, Alex Novik (alex@neocleus.com)
15 * Copyright (c) 2007, Neocleus, Guy Zana (guy@neocleus.com)
16 * Copyright (C) 2008, Qumranet, Amit Shah (amit.shah@qumranet.com)
17 * Copyright (C) 2008, Red Hat, Amit Shah (amit.shah@redhat.com)
18 * Copyright (C) 2008, IBM, Muli Ben-Yehuda (muli@il.ibm.com)
21 #ifndef HW_VFIO_VFIO_COMMON_H
22 #define HW_VFIO_VFIO_COMMON_H
24 #include "qemu-common.h"
25 #include "exec/address-spaces.h"
26 #include "exec/memory.h"
27 #include "qemu/queue.h"
28 #include "qemu/notify.h"
30 #include <linux/vfio.h>
33 /*#define DEBUG_VFIO*/
35 #define DPRINTF(fmt, ...) \
36 do { fprintf(stderr, "vfio: " fmt, ## __VA_ARGS__); } while (0)
38 #define DPRINTF(fmt, ...) \
43 VFIO_DEVICE_TYPE_PCI = 0,
44 VFIO_DEVICE_TYPE_PLATFORM = 1,
47 typedef struct VFIOMmap {
54 typedef struct VFIORegion {
55 struct VFIODevice *vbasedev;
56 off_t fd_offset; /* offset of region within device fd */
57 MemoryRegion *mem; /* slow, read/write access */
59 uint32_t flags; /* VFIO region flags (rd/wr/mmap) */
62 uint8_t nr; /* cache the region number for debug */
65 typedef struct VFIOAddressSpace {
67 QLIST_HEAD(, VFIOContainer) containers;
68 QLIST_ENTRY(VFIOAddressSpace) list;
73 typedef struct VFIOContainer {
74 VFIOAddressSpace *space;
75 int fd; /* /dev/vfio/vfio, empowered by the attached groups */
76 MemoryListener listener;
77 MemoryListener prereg_listener;
82 * This assumes the host IOMMU can support only a single
83 * contiguous IOVA window. We may need to generalize that in
86 QLIST_HEAD(, VFIOGuestIOMMU) giommu_list;
87 QLIST_HEAD(, VFIOHostDMAWindow) hostwin_list;
88 QLIST_HEAD(, VFIOGroup) group_list;
89 QLIST_ENTRY(VFIOContainer) next;
92 typedef struct VFIOGuestIOMMU {
93 VFIOContainer *container;
97 QLIST_ENTRY(VFIOGuestIOMMU) giommu_next;
100 typedef struct VFIOHostDMAWindow {
103 uint64_t iova_pgsizes;
104 QLIST_ENTRY(VFIOHostDMAWindow) hostwin_next;
107 typedef struct VFIODeviceOps VFIODeviceOps;
109 typedef struct VFIODevice {
110 QLIST_ENTRY(VFIODevice) next;
111 struct VFIOGroup *group;
120 unsigned int num_irqs;
121 unsigned int num_regions;
125 struct VFIODeviceOps {
126 void (*vfio_compute_needs_reset)(VFIODevice *vdev);
127 int (*vfio_hot_reset_multi)(VFIODevice *vdev);
128 void (*vfio_eoi)(VFIODevice *vdev);
131 typedef struct VFIOGroup {
134 VFIOContainer *container;
135 QLIST_HEAD(, VFIODevice) device_list;
136 QLIST_ENTRY(VFIOGroup) next;
137 QLIST_ENTRY(VFIOGroup) container_next;
140 void vfio_put_base_device(VFIODevice *vbasedev);
141 void vfio_disable_irqindex(VFIODevice *vbasedev, int index);
142 void vfio_unmask_single_irqindex(VFIODevice *vbasedev, int index);
143 void vfio_mask_single_irqindex(VFIODevice *vbasedev, int index);
144 void vfio_region_write(void *opaque, hwaddr addr,
145 uint64_t data, unsigned size);
146 uint64_t vfio_region_read(void *opaque,
147 hwaddr addr, unsigned size);
148 int vfio_region_setup(Object *obj, VFIODevice *vbasedev, VFIORegion *region,
149 int index, const char *name);
150 int vfio_region_mmap(VFIORegion *region);
151 void vfio_region_mmaps_set_enabled(VFIORegion *region, bool enabled);
152 void vfio_region_exit(VFIORegion *region);
153 void vfio_region_finalize(VFIORegion *region);
154 void vfio_reset_handler(void *opaque);
155 VFIOGroup *vfio_get_group(int groupid, AddressSpace *as);
156 void vfio_put_group(VFIOGroup *group);
157 int vfio_get_device(VFIOGroup *group, const char *name,
158 VFIODevice *vbasedev);
160 extern const MemoryRegionOps vfio_region_ops;
161 extern QLIST_HEAD(vfio_group_head, VFIOGroup) vfio_group_list;
162 extern QLIST_HEAD(vfio_as_head, VFIOAddressSpace) vfio_address_spaces;
165 int vfio_get_region_info(VFIODevice *vbasedev, int index,
166 struct vfio_region_info **info);
167 int vfio_get_dev_region_info(VFIODevice *vbasedev, uint32_t type,
168 uint32_t subtype, struct vfio_region_info **info);
170 extern const MemoryListener vfio_prereg_listener;
172 int vfio_spapr_create_window(VFIOContainer *container,
173 MemoryRegionSection *section,
175 int vfio_spapr_remove_window(VFIOContainer *container,
176 hwaddr offset_within_address_space);
178 #endif /* HW_VFIO_VFIO_COMMON_H */